チェックボックス

package org.example.test;

import android.app.*;
import android.os.*;
import android.widget.*;
import android.widget.CompoundButton.*;

public class CheckBox extends Activity
{
    public void onCreate(Bundle savedInstanceState)
    {
      super.onCreate(savedInstanceState);

      LinearLayout ll = new LinearLayout(this);
      ll.setOrientation(LinearLayout.VERTICAL);
      setContentView(ll);

      CheckBox cb = new CheckBox(this);
      cb.setText("Check?");

      ll.addView(cb);

      cb.setOnCheckedChangeListener(new SampleCheckedChangeListener());
    }

    class SampleCheckedChangeListener implements OnCheckedChangeListener
    {
      public void onCheckedChanged(CompoundButton cb, boolean isChecked){
        AlertDialog.Builder adlg;
        adlg = new AlertDialog.Builder(HelloWorld.this);
        adlg.setTitle("Test");
        adlg.setMessage("Checked");
        adlg.setPositiveButton("YES", null);
        if(isChecked == true){
          adlg.show();
        }
      }
    }
}